The latest release of Irfan View 4.0 has a plugin for uploading files to a server. Select the files in the thumbnail browser, and from the file menu, select “Transfer Selected Files by FTP ..”
Enter the server name, user name, and folder (these details are remembered), and your password. Thereafter, you only need to enter your password.
If, like me, you often upload images to illustrate a point, this saves loading an FTP program.